Dental apparatus.



S. F. KOHN.

DENTAL APPARATUS.

APPLICATION FILED APR. 15. |915.

L/.qrw Patented Apr. 18, 1916.

4 SHEETS-SHEET s.`

s. F. KUHN.

DENTAL APPARATUS.

APPLICATION FILED APR. I5. I9I5.

LMU/Uw., I Patented Apr. 18,1916.

4 SHEETS-SHEET 4.

SIGMUND E. KOHN, 0F NEW YORK, N. Y.

DENTAL APPARATUS.

Application led April 15, 1915.

To all whom t may concern:

Be it known that I, SIGMUND F. KoHN, a citizen of the United States, and a resident of the city of New York, borough of the Bronx, in the county of Bronx and State of New York, have invented a new and Improved Dental Apparatus, of which the following is a full, clear, and exact description.

Among the principal objects which the present invention has in view are: to provide an apparatus of the character mentioned with means for furnishing va steady supply of air and gas to sustain a burner flame; to provide a unit engine for performing a series of allied functions; and to provide an apparatus of the character mentioned with a prime mover operatively connected with a series of mechanisms for performing allied and progressively-required functions, and with a receptacle for holding tools and accessories to said mechanisms.

Drawings-Figure 1 is a front view of an apparatus constructed and arranged in accordance ywith the present invention; Fig. 2 is a vertical section of the same,taken on the line 2-2 in Fig. 1; Fig. 3 is a detail view showing a fragment of the engine and connection therefor; Fig. 4 is a similar view showing the application of a special tool to the apparatus; Fig. 5 is a horizontal section taken on the line 5--5 in Fig. 2; Fig. 6 is a detail view in vertical section showing the application to the apparatus of a special tool; Fig. 7 is a side view of a modified form of the apparatus, showing the same as applied to a municipal electric supply; Fig. 8 is a vertical section of the apparatus, showing the same as equipped for employment as a dental engine.

Description-As seen in the accompanying drawings, an electric motor 15 is mounted in a cylindrical case 16 and is provided with an electric current received from any suitable source, such as the dry cells 17 forming a battery, as shown in Fig. 2 of the drawings. 'Ihe cylindrical case 16 is pivotally secured to a rectangular case 18, the upper portion whereof forms a receptacle for the cells 17 of the electric battery. The sides of the case 18 are constructed to form a tray 19 surrounding said case. This tray is utilized for holding instruments or attachments used in connection with the motor 15, and generally in the operations carried on by the dentist employing said apparatus. 'Ihe receptacle for said instru- Specification of Letters Patent.

Patented -dpr. 18, 1916.

Serial No. 21,574.

ments and accessories is formed by a drawer 20, slide rails 21 for which are provided in the case 18, as shown best in Fig. 2 of the drawings. To support the drawer when fully extended, legs 22 are pivotally mounted upon said drawer, said legs being connected by a transverse shaft 23, which shaft extends across the drawer and adjacent the inner face of the front 24 of the same. The drawer 20 is provided with a handle 25, by means of which it may be operated.

To gain access to the cells 17 of the electric battery, the drawer 20v is totally removed. 'I`he operator may then grasp the curled edge 26 of a supporting slide 27 and withdraw said slide. The slide 27 being withdrawn, the cells 17 may be removed and others substituted therefor.

The cells 17 forming the battery are suitably coupled, and are connected by means of surface wires with the motor 15 and with a controlling switch 28 for operating said motor. When said switch is closed, the armature and shaft 29 thereof are driven. In the form of the inventio-n shown in Figs. 1 and 2, the shaft 2.9 has rigidly mounted thereon a composite fan having lower blades 30 and upper blades 31. Said blades are interleaved, and the upper blades are arranged to draw air into the cylinder 16, through perforations 32 in the cover 33 provided for Said cylinder. The blades 30 are shorter than the blades 31. The arrangement of blades set forth facilitates the delivery of air through an opening 34 in the cylinder 16. The opening 34 is covered by a housing 35, from which open short pipes 36. The pipes 36 are operatively connected by a cross tube 37, which tube is pivotally mounted in the ends of the pipes 36 and is bored lengthwise to form a transverse passage 38, which communicates with a longitudinal passage 39. The passages 38 and 39 are formed inan integral body which swivels or pivots about the tube 37, to allow the same to assume the position shown by dotted lines in Fig. 2 of the drawings. In this manner, air or gas delivered to the tube 37 may be delivered therefrom at a variety of working angles. The ends of the passage 39 may be closed by a cap 40 or a tube 41. The tube 41 may be closed by a cap 42, removable when an extension, such as the mixing tube 75 shown in Fig. 4 of the draw-` ings, or a plurality of other attachments are operatively connected with the tube 37.

The air which isdelivered bythe blades 30 and 31 to the tube 37 is there mixed with illuminating gas. Any suitable supply of illuminating gas is connected with the present apparatus by means of a pipe 43, the connecting end 44 whereof is ridged to receive and hold a. flexible gas pipe such as a rubber tube. The pipe 43 has a vertical extension which normally rests between, and forms a unit structure with the short pipes 36, as seen best in Fig. 5 of the drawings. The pipe 43 is operatively connected with a plug housing 45, in which a passage plug 46 is mounted. The plug 46 has a wing head 47, whereby said plug is manipulated. The passage in the plug 46 forms communication between the by-pass pipe 48 and a small delivery tube 49. The tube 49, as seen best in Fig. 5 of the drawings, is bent to extend lengthwise of the passage 39. The end of the passage 39 containing the tube 49 receives the air supply from both of the pipes 36, the condensed volume whereof, traveling rapidly past the delivery end of the tube 49, operates to draw the gas therefrom for mixture therewith to form a Bunsen flame when lighted at the end of the various burning attachments with which the apparatus is provided.

To facilitate the employment of the apparatus, the cylinder 16 is pivotally mounted on the case 18, a screw-threaded stud 50 serving as a pivot. To fix the adjusted position of the cylinder 16 .a wing nut 51 engages the stud 50, as shown best in Fig. 2 of the draw- 1n s.

s shown best in Fig. 7 of the drawings, the battery having the cells 17 may be dispensed with and the motor 15 connected with a municipal supplyby means of a connecting plug 52 and lead wires connected therewit y A variety of attachments may be employed in connection ywith the tube 37. When the tube 41 is employed, blow-pipes 53 and 54 are used. The pipe 54 is provided with a cap 55 having a centrally located, reduced orifice 56. A needle flame, desired for certain classes4 of work, may be obtained when using this attachment. As shown by dotted lines in Fig. 2 of the drawings, both pipes 53 and 54 may be turned to various vertical angles by swinging the attachment on the tube 37. To fix the adjusted working position of the tube 37, a screw 57 is employed, as shown best in Fig. 5 of the drawings. The pipes 53 and 54 may also be turned to various horizontal angles, as shown best in Fig. 5 of the drawings. For this purpose a swivel plug 58 is employed in connection with thetube 41. A set screw 59 may be manipulated to fix'the working horizontal langle of the pipes 53 and 54 in the same -manner as the screw 57 fixes the working vertical angle. Extending from the tube 37 to form a passage 60 is a short nipple 61, the end of which is screw-threaded to receive a can 62. The openings at the ends of all of the passages are controlled by a screw 63, the inner end of which is tapered to form a needle valve adapted to reduce said passages. The screw 63 is provided with a milled head 64, by means of which said screw is conveniently manipulated.

When it is desired to employ the furnace 65, the tube 37 is rotated to the position as shown in Fig. 6 of the drawings, the screw l63 and milled nut 64 thereof being extended to the front side of the apparatus. In this position, the end of the passage 39 which is normally closed by the cap 40 is disposed vertically, while the nipple 61 and cap 62 are turned inward toward the casing 16. The tube 41 being in this position out of use, the opening where formerly the pipes 53 and 54 were fitted, is closed by a plug 66.

The furnace 65 has a wire screen 67 and a supporting annular rim 68, whereon is placed any suitable utensil. The utensil usually employed is a crucible wherein is melt` ed the metals which the dentist usually employs in his operations.

In the various applications shown in the accompanying drawings it has been deemed wise to show the equipment as employing but one attachment. It will, however, be understood that when desired this may be varied by employing two or more attachments. It will be understood also that this attachment can be used successively or simultaneously. For the sake of clarity it hasl been deemed wise to omit from the specification a separate description of each of the attachments.

In the modified form of the invention shown in Fig. 8 of the drawings, the motor l5 is employed for operating a drill chuck 69 and a flexible shaft 70 connected therewith. To accommodate the motor 15 to the dual employment, the armature shaft 71 rotates freely within a miter wheel 72 and the fan above described. A clutch member 73 is shifted by means of a lever 74. When the lever 74 is moved to engage the clutch member 73 with the wheel 72, the drill chuck and shaft connected therewith are rotated, while the fan is operatively disconnected. Vhen the lever 74 is shifted so as to engage said cone member and the fan, the wheel 72 and parts connected therewith are operatively disengaged. It is the intention that the drill chuck and fan should be operated alternately and not simultaneously, experience having shown that when the apparatus is employed for heating, it is not required for drilling, and vice versa.

Claims:

1. An apparatus as characterized, comprising a cylindrical case having a cover provided with openings forming air ducts leading into said case; an air-propulsion fan mounted in said cylindrical case; a chambered housing mounted on said cylindrical case in the rotary plane of said fan for receiving air therefrom; a plurality of air ducts opening out of said housing; a cross tube pivotally connecting with said ducts for receiving the air therefrom, said tube having a plurality of outlets disposed between the ends thereof, said outlets being adapted for delivery to a number of operative connections; and a screw valve mounted in said tube for closing uniformly all of said outlets.

An apparatus as characterized, comprising a cylindrical case having acover provided with openings forming air ducts leading into said case; an air-propulsion fan mounted in said cylindrical case; a chambered housing mounted on said cylindrical case in the rotary plane of said fan for receiving air therefrom; a plurality of air ducts opening out of said housing; a cross tube pivotally connecting with said ducts for receiving the air therefrom, said tube having a plurality of outlets disposed between the ends thereof, said outlets being adapted for delivery to a number of operative connections; a screw valve mounted in said tube for closing uniformly all of said outlets; and a gas supply embodying a deoplea et thm patent may be obtained for lil;

livery tube mounted in said cross tube and coaxial therewith, said supply being extended into one of said outlets for supplying gas thereto.

3. An apparatus as characterized, comprising a cylindrical case having a cover provided with openings forming air ducts leading into said case; an air-propulsion fan mounted in said cylindrical case; a chambered housing mounted on said cylindrical Case in the rotary plane of said fan for receiving air therefrom; a plurality of air ducts opening out of said housing; a cross tube pivotally connecting with said ducts for receiving the air therefrom, said tube having a plurality of outlets disposed between the ends thereof, said outlets being adapted for delivery to a number of operative connections; a screw valve mounted in said tube for closing uniformly all of said outlets; and an electric motor operatively connected with said fan and supported in said cylindrical case for operating said fan.

In testimony whereof l have signed my name to this specification in the presence of two subscribing witnesses.

SGMUND F. KOHN.

Witnesses:

E. F. MURDOCK, Lois LISMAN.

ve cents each, by addressing the Commissioner of Patent-,

Washington, D. G. 

